Blowpipe for blast-furnaces



E. L. IVES.

BLOVFPE FOR BLAST FURNACES.

APPLICAHON FILED MAR. 27. I918.

Patented Dec. 21, 1920.

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nnwann L. was, or CHICAGO, ILLINOIS.

isnowrrrn FORJBLAST-FUBNACES.

To all 'eohom it may concern:

Be it known that I, EDWARD L; Ivns, a c1t1- zen" of the United States, residing at Chicago,

in the county of Cook and Stateof Illinois,

have invented certain new and useful Im provements in Blowpipes for Blast-Fur-v naces of which the following is a specifiintothe furnace.

cation. I

My invention relates to means for securing heat insulation and protection for the blowpipes of blast furnaces and has for its principal object the provision of heat 1n sulated blow pipes for blast furnaces WhlCh will conservethe heatof the hot air blast and prevent loss of heat by radiation as the hot air blast passes through the blow pipes I sidered that'each furnace. has'from eight to twelve blow pipes a very largesurface is exposed, thus causing heat from the air blast. v A further object of my invention is the provision of means whereby the blow plpes will be rendered more. durable and will not burn out so quickly in service thus necesa very great loss of sitating frequent renewals. A further ob'ect of my'inventlon is the provision of insulating means which can be readily removed and renewed should occasion require and which will be eflicient and economical 1n operat1on,and wh1ch can be manufactured at lowcost.

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My invention will be further'and better understood byreference to the accompanyin drawings,'and in which-*- i re 1 is a sectional viewof the bottom blast furnace; v Fig. 2 is a sectional view of a blowpipe, and

Fl .2. v fieferring now specifically'to the drawings and in which like reference characters refer to like parts throughoutfltl'is the'bosh wall of the furnace, and 11 is the supporting column up to the, mantle of the Specification of Letters Patent.

furnace.

Fig. 3 is a cross section on line of I rammed Dec. 21, 1920.

Application filed larch 27, 1913. Serial No. 224,927.

The bustle pipe 12 carrying the hot blast extends circumferentially around the outside of the furnace wall and is held in position by means of a suitable support 13 secured to the top of the supporting column l1.- Leading from the bustle pipe 12 is another pipe 14 commonly known as the i down leg. or boot leg, suspended by means of a rod 15, or in any other suitable manner, and is connected to the blow pipe 16 by a ball and socket joint, the blow plpe extending through the furnace wall 10 and connecting. atits inner end with the twyer 17, mounted within a twyer cooler 18. The boot leg 14 is secured at its lower end by means of a rod 19 havingahinge connection with the blast furnace wall at its inner end and a coiled spring 20 on its outer end and passes through an opening in a downwardly projectinglug 21 so that as the nut 22 'on the outer end of the rod 19 is tightened,

the pipe 14 will be drawn toward the furnace, and thus holding the blow pipe 16 securely in position. Fitting within the blowpipe 16 I providea cylindrical sleeve '23 preferably of asbestos or any other suitable heat resisting material which is held in position by contacting against an annular shoulder 24 on the inside'inner end of the blow pipe 16 and a ainst the pipe 14 at its outerend when the'blow pipe 16 is in position,

slight allowance being made for expansion of the sleeve 23 under conditions of service. It will be understood that the cylindrical sleeve 23 can be easily inserted into and removed from the.blow pipe 16, and easil renewed when worn out in service. It wi 1 thus be seen that I provide a blow pipe which in service is much more durable than the usual construction, and hence does not have to be renewed so frequently with the consequent loss of time and expense, and

which will prevent the loss of heat from the air blast by radiation.

Vllfhile I have described more or less re else the details of construction whic I emp 0y, I do notwish to be understood as limiting m self thereto, as I contemplate changes in orm and the proportions of parts I and the substitution of equivalents as circumstances may suggest or render expedient without departing from the spirit or scope of m invention.

I c aim:

1. In a blast furnace, a twyer, a blow pipe seated against and having an internal shoulder in proximity to said twyer, a cylinseated against and having an internal shoul-.

der in proximity to said twyer, a cylindrical removably fitting insulating sleeve within said blow pipe and confined at its forward end by said shoulder, and a hot air pipe seated against the rear end of the blow pipe and confining the sleeve therein.

3. In a blast furnace, a twyer, a blow pipe seated against and having an internal shoulder in proximity to said twyer, a cylindrical removably fitting asbestos sleeve within said blow pipeand confined at its forward end by said shoulder and a hot air pipe seating against the rear end of the blow pipe and confining the sleeve therein.

4. The combination of a blow pipe for blast furnaces and a cylindrical'asbestos member removably positioned within said blow pipe. I

5. In combination, a blow pipe forblast furnaces, having an annular shoulder at its forward end and a "removably cylindrical heat insulating member forming a lining for said blow pipe, the said shoulder forming means for retaining the lining in proper position.

Signed at Chicago, State of Illinois, this 25th day of March, A. D. 1918.

EDWARD L. IVES. 

